The power supplied by a certain battery is a constant 6.0 W over the first 5 minutes, zero for the next 2 min, a value that increases linearly from zero to 10 W during the next 10 minutes, and a power that decreases linearly from 10W to zero in the following 7.0 minutes.
A) What is the total energy in Joules expended during this 24 minute interval?
B) What is the average power in W during this time?